They founded the Arlo Publishing Company, through which many of their works were published. Together they wrote: The Busy Builder's Book (1912), Arlo (1915), Clematis (1917), Anita: A Story of the Rocky Mountains (1920), Pathways of European Peoples (1922), Allspice: The Adventures of Daddy Fox, Ginger Bear, The Miller and The Miller's Wife (1924), Who Knows? A Book of Puzzle Stories with New Verses for Dramatic Reading (1924), Dan's Boy (1926), Pennie (1927), Andre (1930), One Foot on the Ground: A Plea for Common-Sense Education (1932), Robin (1934), Hand in Hand With Father Time (? ) and Adam Lee (1938). With their daughter Madeline W. Cobb they wrote The Mind's Eye: Life and Learning Through the Mental Picture (1941) and An American Eagle: The Story of Benjamin Franklin (1944).